Or maybe all of them? Another doodle made during class. Yes, the ugly, mangy appearance is intentional. Agriotherium, a giant prehistoric bear that was very widespread and even found in Africa, is sometimes called "hyena-bear" due to its proportions and its powerful, bone-crushing jaws. A recent study suggested that Agriotherium had a stronger bite force than any other known land-dwelling carnivorous mammal.If we consider its long limbs, it is very likely that it could also run faster than modern day bears.

Nice drawing. I hypothesized about a connection between the Nandi-Bear and Agriotherium africanum already more than a decade ago. Some years ago I made also two paintings of the Nandi-Bear which are at least to some degree inspired by the bear-ID:

I have to add of course, I do not really believe in the existence of the Nandi Bear, but it is still one of my favourite cryptids, as it is a true man-eating monster, but still within the realms of (theoretical) possibilty.

The usual IDs like chalicotheres, giant hyenas or giant baboons (like Theropithecus brumpti) are quite common even in older books, but as I said, I have read about the connection with Agriotherium. Can you tell me in which book this was?